:root {
    --bg-color: #f8fafc;
    --pane-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --terminal-bg: #1e1e1e;
    --terminal-text: #f0f0f0;
    --code-font: 'Fira Code', monospace;
    
    --syn-keyword: #a855f7;
    --syn-command: #2563eb;
    --syn-string: #16a34a;
    --syn-comment: #94a3b8;
    --syn-bracket: #64748b;
    --syn-error: #ef4444;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --pane-bg: #1e293b;
    --text-color: #f1f5f9;
    --border-color: #334155;
    --accent-color: #3b82f6;
    --accent-hover: #60a5fa;
    --terminal-bg: #000000;
    
    --syn-keyword: #d8b4fe;
    --syn-command: #60a5fa;
    --syn-string: #4ade80;
    --syn-comment: #64748b;
    --syn-bracket: #94a3b8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.navbar {
    height: 60px;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background: var(--pane-bg);
}

.logo-container { display: flex; align-items: center; gap: 10px; }
.mini-3d-logo {
    width: 24px; height: 24px;
    background: linear-gradient(135deg, #2563eb, #fbca1f);
    border-radius: 6px;
    transform: rotate(45deg);
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}
.brand-name { font-weight: 800; font-size: 1.2rem; }
.brand-sub { font-weight: 400; opacity: 0.7; }

.nav-controls { display: flex; gap: 10px; align-items: center; }

.filename-input {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-family: var(--code-font);
    font-size: 0.9rem;
    outline: none;
}
.filename-input:focus { border-color: var(--accent-color); }

.btn {
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon { background: transparent; color: var(--text-color); padding: 8px; }
.btn-icon:hover { background: rgba(128,128,128,0.1); }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }

.btn-run { background: var(--accent-color); color: white; }
.btn-run:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-clear { background: transparent; color: var(--text-color); border: 1px solid var(--border-color); }
.btn-clear:hover { background: rgba(128,128,128,0.1); }

.workspace {
    flex: 1;
    display: flex;
    gap: 1px;
    background: var(--border-color);
}

.pane {
    flex: 1;
    background: var(--pane-bg);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.pane-header {
    height: 40px;
    padding: 0 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
}
.pane-title { font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; opacity: 0.7; }
.pane-actions { display: flex; align-items: center; gap: 10px; }

.editor-container {
    position: relative;
    flex: 1;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
}

#code-input, #highlighting {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    padding: 20px;
    border: none;
    font-family: var(--code-font);
    font-size: inherit;
    line-height: inherit;
    tab-size: 4;
    white-space: pre;
    overflow: auto;
    margin: 0;
}

#code-input {
    z-index: 2;
    background: transparent;
    color: transparent;
    caret-color: var(--text-color);
    outline: none;
    resize: none;
}

#highlighting {
    z-index: 1;
    background: var(--pane-bg);
    pointer-events: none;
}

.terminal-pane { flex: 0.8; border-left: 1px solid var(--border-color); }
.terminal-body {
    flex: 1;
    background: var(--terminal-bg);
    color: var(--terminal-text);
    font-family: var(--code-font);
    padding: 15px;
    overflow-y: auto;
    font-size: 13px;
}
.term-line { margin-bottom: 4px; word-break: break-all; }
.system-msg { opacity: 0.5; font-style: italic; }
.exec-time { font-size: 0.8rem; font-family: var(--code-font); opacity: 0.7; }

.keyword { color: var(--syn-keyword); font-weight: bold; }
.command { color: var(--syn-command); }
.string { color: var(--syn-string); }
.comment { color: var(--syn-comment); font-style: italic; }
.bracket { color: var(--syn-bracket); }
.escape { color: #f59e0b; }
.error-token { text-decoration: underline wavy var(--syn-error); }

@media (max-width: 768px) {
    .workspace { flex-direction: column; }
    .terminal-pane { border-left: none; border-top: 1px solid var(--border-color); height: 40%; flex: none; }
}